import { resolve } from 'path';
import { defineConfig } from 'vite';
import dts from 'vite-plugin-dts';

export default defineConfig({
    build: {
        target: 'es2022',
        lib: {
            entry: resolve(__dirname, 'src/entry.ts'),
            formats: ['es'],
            fileName: 'impost',
        },
        rollupOptions: {
            external: [/^lit/, /^@lit\//],
            output: {
                preserveModules: false,
                dir: 'dist',
            },
        },
        // WARN: this setting has caused issues for me in the past, but now it
        // seems to work fine. I'm not sure why, but minifying the bundle saves
        // 5KB, and it doesnt *cause* issues, so I'm leaving it on.
        minify: true,
    },

    plugins: [
        dts(),
    ],
});